Process of punching.



W. RAWLEY.

PROCESS 0F PUNCHING.

APPLICATION FILED MAY x9. 1914.

Patented Oct. 19, 1915.

TOR

At'ys.

WITNESSES 244,41 .25g/fw COLUMBIA PLANDURAPH cD..wASHlNUTuN. D. CA

. Lisanne.

WAYNE nnwnn, on rrmrsnunen', .rnnnsYnvnnrn assrsnoit Tifo ,nnnw ern-:nn

consrnucrron sonnen-Y, onlnononninfbtnw JEnns Jnnsny. p

To allwomz't may concern: n

Be 1t known that I, XVAYNE RAwnnL a citizen of the -United States,residi ngat Pittsburgh, in the county of Allegheny and Stateof Pennsylvania,A haveinvented a certain new and useful Process. of Punching, of which the'ollowlng is a specification.

The inventlon C relates to Aa ,process r01:'

v punching material such as long strips or bars of metal where a series., of holeshaving a certain predeternnned spacing lare required. The invention has -for its object, theprovision of a procedure whereby alselries of setsof punches can be utililzked l:si-

multaneously Vor afterjeach movementoffthe material, so that the rtime zonsumedv in .quired may be reducedto Va minimurmand Fig. l is .al diagranimaticyiew indicating ,thelarrangement of punhesandstops for fthestrips otmaterial tofbe "punched, and Fig. 2 is a Vplan view ot'a strip` of A`1 rnaterpial after being punched bythe Vlininching ar-l rangement of'Fig; 1.

One of the primary uses of theprocess arises where; the spacing of the holes inzthe stripA of material need not be exaetlyuniform, but may vary withinrcertainjdlimits, andwhere it is desired to use a battery of punches already' set up for use for other purposes, and separated by suchggdistances that without the practice offthe present invention a plurality ofrnachines `could not be used simultaneously upon-the same materiaL One specific. ,use fors the processfarises-,inuthe material being punched is moved after each 95 punching of the rivet holes in the vle'gslc built-up poles wherein diagonal lacing strips eXtend from one leg of the pole to the next and are secured inl their positions by means of rivets or bolts extending through thesaid holes. These legs or strips are in the form of angle ironsvas indicated in Fig. 2, but it will be understood that this showing is merely illustrative, and that the process is applicable to other shapes and cross sec'- In the arrangement as shown in Fig.- there are foursets of punches, M, N, O, and P, the individual punches being indicated by the reference numerals l to 11, and the distances between the individual punches rnocnss or rumor-imc;

SpecificationOLLSttersPatent; Y 1915 Application lefMey 19,191.4.AV jserialNo.rssasloa l i i' i oated iby, thornninoials accompanied iby the distance between thepunohoslband 2 sifour fandi onefhalt nohesfbetwoon the punches 21,60

nndiisiveinohos, and'betweenithennnoh of the .set andlth'o punoh .4 ofitholset iN f lslrefeot; anolk eleven inches :These dimenisionsi obrrespondvto usensaotnally made by une,n andithousolhero I 1n connection ,with .the .165

.1fohinesoarryng,those. ,S ofgpnnohes 1M, QN, 0, :7 0

@andiR-nlayibe of anygtybinnd rnanglnont may Carry y any set be thrown ont of l opolnton chine th. .divdnal punohos ,are held from .moving uni nd jandlso boing inoperatiy, bymeans oithfhng blocks so that when it iis-[desired :to thnowlnny, punch@ ont of operartonit slgrnenely neoossarytoirnovo thosnpwso ion l'the .85

-ga'hoseuare preferablytposl o Stop means, hnttho rpno'ess. oonldloo canned ont uit` z-.tllo same etfect if.v the stop'` nieans'were merel'7 i-ndicatingl marks to ewhichjtheeend of fthey ypunching operation. The spacingy between these.V stops asindicated in lfeet and inches is the spacing required for the punching of thebar as illustrated in Fig. 2. Below is a the strip of material, bythe tableindicating the punchesused, when the 1070 end p of the material being punched is brought to each of the'stops. I At stop A throw in gear the punches 1-6-8-10-11 n L. 1g t.: i. glom i u u I u u L u 10 11 Y u u D n u x. 'n n u` 3 6 7 10 1l. u uV E u u u u yl. 2 11 u u F u u- :f ts u 4 n n G Vu uu y' uV u u 4' v u u H in M ny u i u n `3 Fig. 2 illustrates the punching'secured in 4use of. the` punches and stops spaced as indicated in Fig. 1. When the end of the strip is at the stop A, the holes marked a, a, a, a, a, are

punched in the strip of material, and the punches employed in punching these holes are the punches l, 6, 8, 10, and 1l. rlihe strip of material is then moved to the right until its end is at the stop B when the second punching operation occurs. In this operation the holes b, b, b, b, Z), are punched, and the punches employed are Vthe punches Vmarked 2, 1l, 7, 10, and l1 on Fig. l. The

rest of the table will be clear without turther explanation, and it will be seen that while the spacing of the holes is not uniform it is approximately so, with an increase in dimension fromv the right to the left hand end of' the bar or strip. lt will be seen that in each operation a number of punches are not used, and in the sets M, N, and O, one

punch only is used during each operation.

The other punches in the sets are thrown out as heretofore explained. lt `will also be `seen that it is characteristic of the arrangement of punches that the distance between the punches in each set is equal to or lessY than the distance between the holes to be punched in the bar, and that the distances between the sets of punches is greater than the distances between the holes to be punched. The use of the relatively closely spaced punches in each set permits oi' the selection as indicated in the table, whereby a certain amount of adjustment is permitted in positioning the holes, and the process permits of the use of a series of punchingmachines for simultaneous use, where such machines were not designed nor positioned for that particular use. ln other words, the process permits the use of the ordinary shop equipment to secure the punching of a strip of material substantially uniformly, in a minimum amount of time and with a minimum number of shifts Aof the strip or bar. The process is of course particularly useful where there are a large number of parts or strips to be punched, so that the ma- Copies of this patent may be obtained for chines can operate for a considerable period of time without a rearrangement of punches or stops.

What l claim is: l. A process of punching a series of holes with a predetermined spacing in a blank,

which consists in positioning the blank and vided with the desired series of holes spaced with exact and approximate regularity.

2. A process of punching a series of holes with a predetermined spacing in a blank, which consists in positioning the blank and punching a set of holes therein while the blankis in such position, some of which holes are spaced apart distances substantially multiples of the distances of the said predetermined spacing, and some of which are spaced apart the desired linal spacing, feeding the blank ahead a predetermined distance, and punching another set of holes in the blank while in such position, a part of which lie between the holes of the firstset having the multiple distance spacing, and similarly repeating the operation until the blank is provided with the desired series of holes, a part of which are regularly spacedand a part of which are spaced with approximate regularity.

In testimony whereof I have hereunto Q signed my name in the presence of the two subscribed witnesses.

I WAYNE RAVLEY.

Witnesses CHAs. WV. PELTON, Gr. J. BRODENGEYER.

five cents each, by addressing the Commissioner of Patents, Washington, D. C'. 

